RanitidineOmeprazoleHistamine H2 AntagonistsAnti-Ulcer AgentsCimetidineBismuthFamotidineGastric AcidGastric Acidity DeterminationProton Pump Inhibitors2-PyridinylmethylsulfinylbenzimidazolesStomach UlcerMagnesium HydroxideLansoprazoleSucralfateDuodenal UlcerFuransAntacidsEsophagitis, PepticHeartburnAmoxicillinHelicobacter pyloriClarithromycinHelicobacter InfectionsMetronidazoleRabeprazoleDouble-Blind MethodSulfoxidesGastroesophageal RefluxAluminum HydroxidePeptic UlcerDrug InteractionsGastric MucosaDrug Therapy, CombinationPeptic Ulcer HemorrhageBenzimidazolesGastrinsCross-Over StudiesGastric JuiceReceptors, Histamine H2EsophagitisDyspepsiaStomachHistamine AntagonistsHydrogen-Ion ConcentrationFurazolidoneEnprostilHistaminePenicillinsTinidazoleBreath TestsPentagastrinBiological AvailabilityAdministration, OralAnti-Bacterial AgentsAryl Hydrocarbon HydroxylasesNizatidineEsophagusArea Under CurveDrug Administration SchedulePyrilamineHistamine AgonistsAntitrichomonal AgentsReceptors, HistamineHalf-LifeTetracyclineTreatment Outcome